66
4. Troubleshooting
FIGURE
TESTS MEASURE
RESULTS
Door Lock
Door Lock
*
Measure the state of micro switch
and motor after taking off harness
from the heater .
*
Check whether lock work normally
by pressing cooking time button and
delay start keypad at the same time
for 3 seconds .
*
Lock motor
Resistance : 1750 ~ 1850Ω
(at the room temperature)
voltage : 120V
*
Micro switch
COM-NO
*
Replace or repair if harness has
been loosen or disconnected .
Oven Lamp Socket
Oven Lamp Socket
*
First of all, make sure that lamp
filament is disconnected or not.
*
Measure resistance socket’s terminal
after separating harness from heater
and removing lamp .
*
Measure the voltage of socket’s
terminal after having lamp worked by
pressing oven light keypad .
*
Approx :
Ω
*
Terminal voltage of lamp socket :
120V
*
Replace or repair harness .
*
Replace or repair sub PCB
Convection Fan
Convection Fan
*
Measure resistance value of Motor
terminal after taking off harness from
Motor .
*
Measure Voltage of Motor’s terminal
after making oven work by pressing
bake keypad .
(Make sure that voltage has to be
measured for more than 1 minute
because Fan is supposed to on-off
Cycling work .)
Approx
*
Convection Fan : 20 ~ 30Ω
*
Sub Fan : 85 ~ 100Ω*
(Upper, Lower)
*
Terminal Voltage of Convection
Fan and Sub Fan : 120V
*
Replace or repair harness
*
Replace or repair Sub PCB
Sub Fan(Lower)
Sub Fan(Lower)
Sub Fan(Upper)
Sub Fan(Upper)
4-2 Electrical Malfunction
∞